After plenty of buildup and anticipation, the 2016 Rio Olympics open on Friday, Aug. 5, with most of the sports kicking off on Saturday, Aug. 6 (with the exception of women’s soccer, which starts group play on Wednesday, Aug. 3). But with the Olympics comes mostly sports that the average sports fan tunes into once every four years, so at SI.com, we have compiled a primer for every single sport contested in the coming weeks in Rio de Janeiro. Table tennis? Check. Handball? Check. Modern pentathlon? Check.

Making its debut at the 2016 Rio Olympics, rugby sevens will be largely dominated by Australia, New Zealand and South Africa. Though don’t count out the tiny island nation of Fiji, which doesn’t have a single Olympic medal.